<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面不存在</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Minecraft', 'Arial', sans-serif;
        }

        @font-face {
            font-family: 'Minecraft';
            src: url('https://fonts.cdnfonts.com/css/minecraft-4');
            font-display: swap;
        }

        body {
            background: #8cc8ff;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        /* 天空背景 */
        .sky {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to bottom, #8cc8ff 0%, #a4d3ff 100%);
            z-index: -1;
        }

        /* 地面 */
        .ground {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 30%;
            background: #6c9e41;
            z-index: -1;
        }

        /* 草地纹理 */
        .ground::before {
            content: '';
            position: absolute;
            top: -10px;
            left: 0;
            width: 100%;
            height: 10px;
            background: #8cc665;
            z-index: -1;
        }

        /* 像素化云朵 */
        .cloud {
            position: absolute;
            background: white;
            border-radius: 50%;
            z-index: 1;
            animation: float 15s infinite linear;
        }

        .cloud-1 {
            width: 100px;
            height: 40px;
            top: 10%;
            left: 5%;
            box-shadow: 50px -10px 0 -10px white, 
                        100px 10px 0 -10px white, 
                        150px -5px 0 -10px white;
            animation-delay: 0s;
        }

        .cloud-2 {
            width: 80px;
            height: 30px;
            top: 15%;
            left: 30%;
            box-shadow: 40px 0px 0 -10px white, 
                        80px -5px 0 -10px white, 
                        120px 5px 0 -10px white;
            animation-delay: 2s;
        }

        .cloud-3 {
            width: 120px;
            height: 50px;
            top: 8%;
            left: 60%;
            box-shadow: 60px -15px 0 -10px white, 
                        120px 5px 0 -10px white, 
                        180px -10px 0 -10px white;
            animation-delay: 4s;
        }

        @keyframes float {
            0% { transform: translateX(-100px); }
            100% { transform: translateX(calc(100vw + 100px)); }
        }

        /* 错误代码 */
        .error-code {
            font-size: 8rem;
            color: #333;
            text-shadow: 4px 4px 0 #999;
            margin: 20px 0;
            letter-spacing: 10px;
            font-weight: bold;
        }

        /* 错误信息 */
        .error-message {
            font-size: 2rem;
            color: #333;
            text-shadow: 2px 2px 0 #999;
            margin-bottom: 30px;
            text-align: center;
        }

        /* 按钮样式 */
        .back-button {
            display: inline-block;
            padding: 15px 30px;
            background: #6c9e41;
            color: white;
            text-decoration: none;
            font-size: 1.2rem;
            border: 4px solid #557a35;
            box-shadow: 4px 4px 0 #446624;
            transition: all 0.2s ease;
            text-shadow: 2px 2px 0 #446624;
            font-weight: bold;
        }

        .back-button:hover {
            transform: translate(2px, 2px);
            box-shadow: 2px 2px 0 #446624;
            background: #7cae51;
        }

        .back-button:active {
            transform: translate(4px, 4px);
            box-shadow: 0 0 0 #446624;
        }

        /* 方块装饰 */
        .block {
            position: absolute;
            width: 40px;
            height: 40px;
            background: #6c9e41;
            border: 2px solid #557a35;
            z-index: 0;
        }

        .block-1 {
            bottom: 100px;
            left: 10%;
        }

        .block-2 {
            bottom: 140px;
            left: 12%;
        }

        .block-3 {
            bottom: 100px;
            right: 10%;
        }

        .block-4 {
            bottom: 140px;
            right: 12%;
        }

        /* 叶子装饰 */
        .leaf {
            position: absolute;
            width: 30px;
            height: 30px;
            background: #8cc665;
            border: 2px solid #7ab455;
            z-index: 0;
        }

        .leaf-1 {
            bottom: 180px;
            left: 15%;
        }

        .leaf-2 {
            bottom: 210px;
            left: 13%;
        }

        .leaf-3 {
            bottom: 180px;
            right: 15%;
        }

        .leaf-4 {
            bottom: 210px;
            right: 13%;
        }

        /* 矿石装饰 */
        .ore {
            position: absolute;
            width: 30px;
            height: 30px;
            background: #c9c9c9;
            border: 2px solid #a9a9a9;
            z-index: 0;
        }

        .ore-1 {
            bottom: 240px;
            left: 20%;
        }

        .ore-2 {
            bottom: 270px;
            left: 18%;
        }

        .ore-3 {
            bottom: 240px;
            right: 20%;
        }

        .ore-4 {
            bottom: 270px;
            right: 18%;
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .error-code {
                font-size: 5rem;
            }
            
            .error-message {
                font-size: 1.5rem;
            }
            
            .back-button {
                font-size: 1rem;
                padding: 10px 20px;
            }
        }
    </style>
</head>
<body>
    <div class="sky"></div>
    <div class="ground"></div>
    
    <div class="cloud cloud-1"></div>
    <div class="cloud cloud-2"></div>
    <div class="cloud cloud-3"></div>
    
    <div class="block block-1"></div>
    <div class="block block-2"></div>
    <div class="block block-3"></div>
    <div class="block block-4"></div>
    
    <div class="leaf leaf-1"></div>
    <div class="leaf leaf-2"></div>
    <div class="leaf leaf-3"></div>
    <div class="leaf leaf-4"></div>
    
    <div class="ore ore-1"></div>
    <div class="ore ore-2"></div>
    <div class="ore ore-3"></div>
    <div class="ore ore-4"></div>
    
    <div class="error-code">404</div>
    <div class="error-message">页面不存在或已被移除</div>
    <a href="/index.html" class="back-button">返回主页</a>
</body>
</html> 